linux/2.6.31: R.I.P.

[openwrt/svn-archive/archive.git] / target / linux / generic / patches-2.6.31 / 222-partial_eraseblock_write.patch

diff --git a/target/linux/generic/patches-2.6.31/222-partial_eraseblock_write.patch b/target/linux/generic/patches-2.6.31/222-partial_eraseblock_write.patch
deleted file mode 100644 (file)
index d3234f0..0000000
--- a/target/linux/generic/patches-2.6.31/222-partial_eraseblock_write.patch
+++ /dev/null
@@ -1,146 +0,0 @@
---- a/drivers/mtd/mtdpart.c
-+++ b/drivers/mtd/mtdpart.c
-@@ -21,6 +21,8 @@
- #include <linux/root_dev.h>
- #include <linux/magic.h>
- 
-+#define MTD_ERASE_PARTIAL     0x8000 /* partition only covers parts of an erase block */
-+
- /* Our partition linked list */
- static LIST_HEAD(mtd_partitions);
- 
-@@ -226,13 +228,60 @@ static int part_erase(struct mtd_info *m
-               return -EROFS;
-       if (instr->addr >= mtd->size)
-               return -EINVAL;
-+
-+      instr->partial_start = false;
-+      if (mtd->flags & MTD_ERASE_PARTIAL) {
-+              size_t readlen = 0;
-+              u64 mtd_ofs;
-+
-+              instr->erase_buf = kmalloc(part->master->erasesize, GFP_ATOMIC);
-+              if (!instr->erase_buf)
-+                      return -ENOMEM;
-+
-+              mtd_ofs = part->offset + instr->addr;
-+              instr->erase_buf_ofs = do_div(mtd_ofs, part->master->erasesize);
-+
-+              if (instr->erase_buf_ofs > 0) {
-+                      instr->addr -= instr->erase_buf_ofs;
-+                      ret = part->master->read(part->master,
-+                              instr->addr + part->offset,
-+                              part->master->erasesize,
-+                              &readlen, instr->erase_buf);
-+
-+                      instr->partial_start = true;
-+              } else {
-+                      mtd_ofs = part->offset + part->mtd.size;
-+                      instr->erase_buf_ofs = part->master->erasesize -
-+                              do_div(mtd_ofs, part->master->erasesize);
-+
-+                      if (instr->erase_buf_ofs > 0) {
-+                              instr->len += instr->erase_buf_ofs;
-+                              ret = part->master->read(part->master,
-+                                      part->offset + instr->addr +
-+                                      instr->len - part->master->erasesize,
-+                                      part->master->erasesize, &readlen,
-+                                      instr->erase_buf);
-+                      } else {
-+                              ret = 0;
-+                      }
-+              }
-+              if (ret < 0) {
-+                      kfree(instr->erase_buf);
-+                      return ret;
-+              }
-+
-+      }
-+
-       instr->addr += part->offset;
-       ret = part->master->erase(part->master, instr);
-       if (ret) {
-               if (instr->fail_addr != MTD_FAIL_ADDR_UNKNOWN)
-                       instr->fail_addr -= part->offset;
-               instr->addr -= part->offset;
-+              if (mtd->flags & MTD_ERASE_PARTIAL)
-+                      kfree(instr->erase_buf);
-       }
-+
-       return ret;
- }
- 
-@@ -240,7 +289,25 @@ void mtd_erase_callback(struct erase_inf
- {
-       if (instr->mtd->erase == part_erase) {
-               struct mtd_part *part = PART(instr->mtd);
-+              size_t wrlen = 0;
- 
-+              if (instr->mtd->flags & MTD_ERASE_PARTIAL) {
-+                      if (instr->partial_start) {
-+                              part->master->write(part->master,
-+                                      instr->addr, instr->erase_buf_ofs,
-+                                      &wrlen, instr->erase_buf);
-+                              instr->addr += instr->erase_buf_ofs;
-+                      } else {
-+                              instr->len -= instr->erase_buf_ofs;
-+                              part->master->write(part->master,
-+                                      instr->addr + instr->len,
-+                                      instr->erase_buf_ofs, &wrlen,
-+                                      instr->erase_buf +
-+                                      part->master->erasesize -
-+                                      instr->erase_buf_ofs);
-+                      }
-+                      kfree(instr->erase_buf);
-+              }
-               if (instr->fail_addr != MTD_FAIL_ADDR_UNKNOWN)
-                       instr->fail_addr -= part->offset;
-               instr->addr -= part->offset;
-@@ -472,18 +539,24 @@ static struct mtd_part *add_one_partitio
-       if ((slave->mtd.flags & MTD_WRITEABLE) &&
-           mtd_mod_by_eb(slave->offset, &slave->mtd)) {
-               /* Doesn't start on a boundary of major erase size */
--              /* FIXME: Let it be writable if it is on a boundary of
--               * _minor_ erase size though */
--              slave->mtd.flags &= ~MTD_WRITEABLE;
--              printk(KERN_WARNING"mtd: partition \"%s\" doesn't start on an erase block boundary -- force read-only\n",
--                      part->name);
-+              slave->mtd.flags |= MTD_ERASE_PARTIAL;
-+              if (((u32) slave->mtd.size) > master->erasesize)
-+                      slave->mtd.flags &= ~MTD_WRITEABLE;
-+              else
-+                      slave->mtd.erasesize = slave->mtd.size;
-       }
-       if ((slave->mtd.flags & MTD_WRITEABLE) &&
--          mtd_mod_by_eb(slave->mtd.size, &slave->mtd)) {
--              slave->mtd.flags &= ~MTD_WRITEABLE;
--              printk(KERN_WARNING"mtd: partition \"%s\" doesn't end on an erase block -- force read-only\n",
--                      part->name);
--      }
-+          mtd_mod_by_eb(slave->offset + slave->mtd.size, &slave->mtd)) {
-+              slave->mtd.flags |= MTD_ERASE_PARTIAL;
-+
-+              if ((u32) slave->mtd.size > master->erasesize)
-+                      slave->mtd.flags &= ~MTD_WRITEABLE;
-+              else
-+                      slave->mtd.erasesize = slave->mtd.size;
-+      }
-+      if ((slave->mtd.flags & (MTD_ERASE_PARTIAL|MTD_WRITEABLE)) == MTD_ERASE_PARTIAL)
-+              printk(KERN_WARNING"mtd: partition \"%s\" must either start or end on erase block boundary or be smaller than an erase block -- forcing read-only\n",
-+                              part->name);
- 
-       slave->mtd.ecclayout = master->ecclayout;
-       if (master->block_isbad) {
---- a/include/linux/mtd/mtd.h
-+++ b/include/linux/mtd/mtd.h
-@@ -46,6 +46,10 @@ struct erase_info {
-       u_long priv;
-       u_char state;
-       struct erase_info *next;
-+
-+      u8 *erase_buf;
-+      u32 erase_buf_ofs;
-+      bool partial_start;
- };
- 
- struct mtd_erase_region_info {